Serum Insulin with 24-Hour Collection (Qualitative/Quantitative Screening)

Why This Test Is Done

Your doctor may order this test if you have symptoms of diabetes, such as frequent urination, extreme thirst, unexplained weight changes, or fatigue. It could also be used to check for conditions like hypoglycemia (low blood sugar), Cushing’s syndrome, or insulinoma (a rare tumor affecting insulin production). Some people with unexplained weight loss, frequent infections, or unusual hunger may also need this test.

How the Test Works

You’ll collect blood samples at multiple times (typically every few hours) over 24 hours. Some tests may require fasting before starting, while others may allow normal eating. The samples are analyzed to measure insulin concentration in your bloodstream.

Note: The slug indicates a qualitative/quantitative screening method, but the exact method (e.g., immunoassay) isn’t specified. Blood is drawn from a vein, usually in your arm, and sent to a lab for analysis. Follow your healthcare provider’s instructions for timing and fasting.

The test involves drawing blood at specific intervals to track insulin levels throughout the day. This helps identify patterns that may indicate how your body processes glucose.

What to Expect Before the Test

You may need to: - Follow fasting instructions (if required) for the first few hours. - Wear a comfortable outfit with sleeves for easy blood draws. - Stay hydrated unless instructed otherwise. - Avoid smoking or caffeine before collection times.